Rotation for rock drills



H. A. GUILEY ROTATION FOR ROCK DRILLS Aug. 14, i923.

INVENTOR //u/' ATTRIEY Patented aug, 14, i923.

f Urrea :sra

ras

RAND COMPANY, JERSEY.

Application sied May 26,

f To all whom t may concern j i GUILEY, citizen of the United Stateafanddrills of the hammer Vtype'.

aresident of Easton, county ofNorthamp-r` t0n, andV State VofPennsylvania, have invented a certain Rotation for Rock Drills, Y

of which the following is a speciiication.

This inventionrelatesto rotation motors for iuid actuated rock drillsbut -inore pa-r-` ticularly too independent rotation 'for rock .Theobjects-of theiiivention are to enable the .powerofthe rotation to beincreased when required by means of one 'or moreauxiliary,motors-adapted to operate simultaneously with the mainrotation mot-or as desired.

Another object fis j to Asecure automatic means for supplying 'motive`fluid to the aun` iliary `motor or motors when the pressure in the mainmotor builds up beyond apredetermined point, thus automatically.assist-N.

ing the main lmotor .-whenneeded. f

The invention is shownin one of its preferred forms in the accompanyingdrawings in which Figure Al. is atop plan view-lof a rock drill partlybroken away and partly in horizontal y section showing scmuch oftheoperative Vparts of the machine as will serve to illustrate theinvention;

Figure 2 is a diagrammatic transverse sectional view of Figure ltaken'through the main motor on the line'Q-Q looking in the direction ofthe arrows;

Figure 3 is a similar view taken through one of the auxiliary motors onthe line 3 3 of Figure l looking in the direction of the arrows, and

Figure 4 is a similar view taken through a second auxiliary motor on theline 1 -4L of Figure l looking in the direction of the arrows.

Referring to the drawings, Figure l illustrates so much of the principalparts of a Huid actuated rock drill of the hammer type as relate to theindependent meansconstructed in accordance with the invention forrotating the drill steel.

or Jnnsnr Grrr, NEW arrasar, s. conronn'rrcN or New ROTATION yED, ROCKDRILLS.

1921, VSerial N0. 472,823.

portion E provides va 4motor casingV closed by a back head F, and thecylinder A, front head D, back cylinder portion lt'. and back head F maybe held together in the usual manner asby means .of the side bolts G.

Rotation is imparted tothedrill steel B by means of a series of fluidactuated rotation motors, ofwhich' the motor l-l may be considered themain motor, andY the motorsJ and K as auxiliary motors. rlhese motorsare preferably all ofthe gear type for imparting vcontinuous rotarymot-ion to the drill steel and in this instance pairs of gears in thetrain of gearing between Vthe inain motor and the drill steelconveniently constitute the auxiliary motors J .and K, and are suppliedwith vmotive fluid by suitable ports and passages, although theauxiliary motors obviously needfnot necessarily be a part ofthe Ygeartrain itself.

The main motor mounted in the back cylindcr portion E, comprises thegears L and O on the spindles P and Q, and motive fluid is suppliedthrough the `passage R andk exwith the gear on the shaft V extendingthrough the cylindercasing to the frontV endof the machine and carryingthe pinion W meshing with the gear X on the rotating chuck C.

The pinion T and gear U in the back cylinder portion Fi together formthe auX- iliary motor J to which motive fluid is supplied through thepassage Y forming a branch from the main supply passage R, and thepinion W and gear X in the front head D together form the auxiliarymotor K to which motive fluid is supplied through the passage Zconveniently forming a branch from the auxiliary passage Y. The motor Jexhausts through the port a and the motor K exhausts through the portl).

The main motor H is powerful enough to rotate the drill steel underordinary conditions, and the auxiliary motors are adapted to assist themain motor when needed. Means are preferably provided for automaticallybringing the auxiliary motors into action successively, so that motiveduid is supplied to each succeeding motor in the series when thepressure in a preceding motor builds up beyond a. predetermined amount.For this purpose, automatic spring pressed valves: c and CZ are providedin theA branch passages Y andv Z respectively', and subjected to thepressure in the motors H and J re-V spectively through the ports e and fleading to the motor casings.`

l/Vhen the pressure inthe mainV motor H Y reaches a predetermined point,thevalvec, which normally closes the branch passage Y Will open saidpassage andA- admit motive' rotating chuck into which the 'Y drillsteel"` isV adapted to extend, a trainoi` pairs' or' rotar-y drivinggears constantly rotating -in series relation betw'veen the main motorand the rotating' chuck, supply and exhaust' ports for each pair ofassociated' driving gears, anylpairoi' associated' driving'vgears beingthereby capablefof cnstitutin;'v an auxiliary motor for assistingrotation by the application of flu-id pressure between the gears ot saidpair, meansA for supplyingmetive Fluid to the main motor and controlledmeans for supplying` motive fluid to an auxiliary. motor in additiontothe main motor: n

2. In a fluid actuated rock drill of the hammer type, the combination ofa percussive element, andren' automatic independent drillsteel rotatingelement cmprising a main fluid actuated rotary gear motor, a rotatingchuck into which the drill steel is adapted to extend, a trainfot pai-rsof rotary e driving gears. constantlyy rotating-in series relationbetween the main motor-andthe rotating-chucln. supply and exhaust portsfor each pair of associated driving gears, any pair of associateddriving gears being thereby capable of constituting an auxiliary motorfor assisting rotation bythe application of fluid pressure betweenfthegears of said pair, and automatic means for supplying motive fluid toYthe auxiliary motor' when.

pressure inthe main rotary gear` motor biiilds upbeyon'di a'predetermined point..

3. In a fluid actuated rocll: drill'gof Athe'- hammer type,thepcombination of a percussive element, and an" automatic independentdrill steel rotating element comprisingV ai main fluid actuated rotarygear motor, a' rotating chuck into which theA drilly steel is adapted toextend, a train *of pairs of rotar-y driving gears constantly rotatingin series 'rel'V lation between' the main motor'and the rotating'cliucli', supply and exhaust ports for the main motor and for each pairof associateddrivinggears, any pair'ofA associated driving gears` beingthereby capable of constituting au auxiliarym'otor for' assistingrotation by the application of fluid pressure between the gears of saidlpair, andante,-

niatic fluid actuated valves for' supplyingfr incisive fluid to each'succeeding meter" inthe series, when pressure" in a receding-- motorbuilds up beyond a predeterminedVVV point.

In testimony whereof I 'have signed this specification V l HENRIvAUGUSTUS GrUIl'JETSL

